CHECKPOINT

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CHECKPOINT

Forces a transaction log checkpoint.

Synopsis

CHECKPOINT

Description

Write-Ahead Logging (WAL) puts a checkpoint in the transaction log every
so often. The automatic checkpoint interval is set per Greenplum Database
segment instance by the server configuration parameters checkpoint_segments
and checkpoint_timeout. The CHECKPOINT command
forces an immediate checkpoint when the command is issued, without waiting
for a scheduled checkpoint.

A checkpoint is a point in the transaction log sequence at which all
data files have been updated to reflect the information in the log. All
data files will be flushed to disk.

Only superusers may call CHECKPOINT. The command
is not intended for use during normal operation.